Page 3
4.1
Process connection
•
By authorized and qualified specialized person-
nel only.
•
The pipes need to be depressurized when the
instrument is being connected.
•
Appropriate steps must be taken to protect the
instrument from pressure surges.
•
Check the suitability of the instrument for the
media to be measured.
•
Maximum pressures must be observed.
•
Do not blow into the pressure connections!
The pressure measuring lines must be installed on
a gradient so that no air pockets e.g. for liquid
measurements or water pockets e.g. for gas meas-
urements can be created. If the required incline is
not reached, water and/or air filters need to be in-
stalled at suitable points.
The pressure sensing lines need to be kept as short
as possible and installed without sharp bends to
avoid disruptive delay times.
The pressure connections are marked with (+) and
(-) symbols on the device. For differential pressure
measurements, the higher pressure is connected to
the (+) side and the lower pressure to the (-) side of
the device.
If the pressure sensing lines are already pressur-
ized at the time of commissioning, zero-point con-
trol and adjustment cannot be performed. In such
cases, the instrument should be only connected to
the mains without the pressure sensing lines.
4.2
Electronic connection
•
By authorized and qualified specialized person-
nel only.
•
The electrical connection of the instrument shall
be performed according to relevant VDE and
local electricity board regulations.
•
Disconnect the system from the mains before
connecting the instrument.
•
Add a fuse adapted to the energy requirements.
3-conductor circuit
Connector 1: Power supply and output signal
Connector 2: Switching outputs
5
Commissioning
All electrical supply, operating and measuring lines,
and the pressure connections must have been cor-
rectly installed before commissioning. All supply
lines are arranged so that there are no mechanical
forces acting on the instrument.
Check the leak-tightness of the pressure connec-
tions.
5.1
Display
The 4-digit LCD display represents the current dif-
ferential pressure in normal mode. The unit is
shown on the right of the display. If the device is
equipped with contacts, a closed contact is always
symbolised by an inverted text "SP1" or "SP2".
The colour of the background lighting can change to
indicate a good / poor measured value. Alternative-
ly, a fixed colour can be defined for the background
colour. The background lighting can also be
switched off.
BN
WH
BU
BK
Bridged internally
Si
g
n
a
l
-S
ig
P
o
w
e
r
s
u
p
p
ly
-
U
b
S
ign
a
l
+
S
ig
n
.c
.
P
o
w
e
r
s
u
p
p
ly
+U
b
BN
WH
BU
BK
SP1
no
SP2
co
m
SP2
no
SP1
co
m
Δ p
Output
Transmitter
Analysis
e.g. SPS
Power supply
Input
+ -
-Sig /
+U
b
+Sig
-U
b
Output
230V ~
L
N
+U
b
-U
b
